Flights to Ontario from US $ 343*
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1 Passenger, Economy
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today
today
United's most popular flights to Ontario (ONT)
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US $
Mexico City (MEX)to
Ontario (ONT)12/02/2026 - 16/02/2026
from
US $ 549
Viewed: 2 minutes ago
Roundtrip
Economy
Cancun (CUN)to
Ontario (ONT)14/01/2026 - 18/01/2026
from
US $ 343
Viewed: 54 minutes ago
Roundtrip
Economy
Cabo San Lucas (SJD)to
Ontario (ONT)28/01/2026 - 04/02/2026
from
US $ 355
Viewed: 21 hours ago
Roundtrip
Economy
*Prices have been available for round trips within the last 48 hours and may not be currently available. For Economy class, fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply. Schedules are subject to change without notice.
Business class deals on flights to Ontario (ONT)
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US $
Mexico City (MEX)to
Ontario (ONT)
17/02/2026 - 25/02/2026
Roundtrip
Business
from
US $ 1,149
Viewed: 1 day ago
*Prices have been available for round trips within the last 48 hours and may not be currently available. For Economy class, fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply. Schedules are subject to change without notice.
Things to do after your flight to Ontario (ONT)
Fly to Ontario with United Airlines from over 200 airports within the United States and an additional 100 airports internationally.
Ontario’s top attractions
- Visit the Ontario Museum of History and Art for an overview of the region.
- Tour the grand Graber Olive House, home to the oldest operating olive packer in the U.S.
- Shop till you drop at Ontario Mills.
- Take the family to Scandia Ontario, an amusement park with rides, mini golf, go karts and games.
- Head to iFLY Ontario for an indoor skydiving experience.
- Relax on the beaches in nearby Los Angeles County.
Best time to travel to Ontario
Visit Ontario during the summer and fall for sunny and dry weather. The Los Angeles County Fair is held for four weeks each fall, beginning on Labor Day. Taste diverse food and drinks from near and far, see farm animals, learn more about agriculture and enjoy live entertainment. The Lights on Miracle Hill in nearby Walnut is the perfect winter warm up for the holidays.